2Y78

Crystal structure of BPSS1823, a Mip-like chaperone from Burkholderia pseudomallei


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.91 Å
  • R-Value Free: 0.116 
  • R-Value Work: 0.109 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Structure of a Burkholderia Pseudomallei Immunophilin-Inhibitor Complex Reveals New Approaches to Antimicrobial Development

Norville, I.H.O'Shea, K.Sarkar-Tyson, M.Zheng, S.Titball, R.W.Varani, G.Harmer, N.J.

(2011) Biochem.J. 437: 413

  • DOI: 10.1042/BJ20110345
  • Primary Citation of Related Structures:  2KE0, 2KO7

  • PubMed Abstract: 
  • Mips (macrophage infectivity potentiators) are a subset of immunophilins associated with virulence in a range of micro-organisms. These proteins possess peptidylprolyl isomerase activity and are inhibited by drugs including rapamycin and tacrolimus. ...

    Mips (macrophage infectivity potentiators) are a subset of immunophilins associated with virulence in a range of micro-organisms. These proteins possess peptidylprolyl isomerase activity and are inhibited by drugs including rapamycin and tacrolimus. We determined the structure of the Mip homologue [BpML1 (Burkholderia pseudomallei Mip-like protein 1)] from the human pathogen and biowarfare threat B. pseudomallei by NMR and X-ray crystallography. The crystal structure suggests that key catalytic residues in the BpML1 active site have unexpected conformational flexibility consistent with a role in catalysis. The structure further revealed BpML1 binding to a helical peptide, in a manner resembling the physiological interaction of human TGFβRI (transforming growth factor β receptor I) with the human immunophilin FKBP12 (FK506-binding protein 12). Furthermore, the structure of BpML1 bound to the class inhibitor cycloheximide N-ethylethanoate showed that this inhibitor mimics such a helical peptide, in contrast with the extended prolyl-peptide mimicking shown by inhibitors such as tacrolimus. We suggest that Mips, and potentially other bacterial immunophilins, participate in protein-protein interactions in addition to their peptidylprolyl isomerase activity, and that some roles of Mip proteins in virulence are independent of their peptidylprolyl isomerase activity.


    Organizational Affiliation

    School of Biosciences, University of Exeter, Geoffrey Pope Building, Stocker Road, Exeter EX4 4QD, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE
A
133Burkholderia pseudomallei (strain K96243)Gene Names: fbp
EC: 5.2.1.8
Find proteins for Q63J95 (Burkholderia pseudomallei (strain K96243))
Go to UniProtKB:  Q63J95
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.91 Å
  • R-Value Free: 0.116 
  • R-Value Work: 0.109 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 54.677α = 90.00
b = 54.677β = 90.00
c = 119.172γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
MOSFLMdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-05-25
    Type: Initial release
  • Version 1.1: 2011-07-27
    Type: Database references, Version format compliance
  • Version 1.2: 2011-08-03
    Type: Derived calculations